Metrohm Multi-Mode Electrode pro - Manual (Page 35)

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5 Maintenance
6.1246.120 Multi-Mode-Electrode pro
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Figure 8 MME pro – Replacing the needle
1 Loosening the needle holder
￭ Place the electrode stand into the drip pan.
￭ Place the MME pro into the electrode stand.
￭ Use the wrench to loosen the needle holder, turn out the screw
as far as it will go.
2 Screwing on the mounting ring
￭ Screw the mounting ring onto the needle holder in clockwise
direction.
3 Pulling out the needle holder
￭ Hold the mounting ring tight and pull out the needle holder by
carefully jiggling it from side to side.